16716623 has 16 divisors (see below), whose sum is σ = 21189120. Its totient is φ = 12808800.

The previous prime is 16716619. The next prime is 16716641. The reversal of 16716623 is 32661761.

It is a cyclic number.

It is not a de Polignac number, because 16716623 - 2² = 16716619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16716623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16716683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2918 + ... + 6476.

It is an arithmetic number, because the mean of its divisors is an integer number (1324320).

Almost surely, 2^16716623 is an apocalyptic number.

16716623 is a deficient number, since it is larger than the sum of its proper divisors (4472497).

16716623 is a wasteful number, since it uses less digits than its factorization.

16716623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638.

The product of its digits is 9072, while the sum is 32.

The square root of 16716623 is about 4088.5967030266. The cubic root of 16716623 is about 255.6914362940.

The spelling of 16716623 in words is "sixteen million, seven hundred sixteen thousand, six hundred twenty-three".